halogen
pronunciation
How to pronounce halogen in British English:
UK [ˈhælədʒən]
How to pronounce halogen in American English:
US [ˈhælədʒən]
-
- Noun:
- any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
Word Origin
- halogen (n.)
- general name for elements of the chlorine family, 1842, from Swedish, coined by Swedish chemist Baron Jöns Jakob Berzelius (1779-1848), literally "salt-producer," from Greek hals "salt" (see halo-) + -gen "giving birth to" (see -gen); so called because a salt is formed in reactions involving these four elements. Related: Halogenous.
Example
- 1. The system is equipped with an ultraviolet lamp and a halogen lamp that produces near-infrared light .
- 2. Then again , make sure you use halogen lighting provided that your home is fitted in a modern style .
- 3. Halogen lamps also waste a great deal of power and generate intense heat that can potentially cause burns or fires .
- 4. If possible , turn off the overhead fluorescent lights in your office and use floor lamps that provide indirect incandescent or halogen lighting instead .
- 5. When bought seven years ago , the family kidmobile came with what were then state-of-the-art quartz-iodine ( halogen ) headlamps .